Improvement in drying apparatus



S. DAVIS.

DRYING APPARATUS. No.1'77,103. Patente'd May 9,1876..

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SAMUEL DAVIS, OF OHICAGO,YILLINOIS.

IMPROVEMENT IN DRYING APPARATUS,

vSpecification forming part of Letters Patent No. 177.103, dated May 9, 18276.; application filed January 12, 1876. i i i To all whom it may concern:

Beit known that I, SAMUEL DAVIS, of Chicago, in the county of Cook and State of lllinois, have invented a' new and useful Improvement in Heating and Drying Apparatus for rlreating Animal Matter; and Ihereby declare the following to be av full, clear, and exact description thereof, which will enable others skilled in the art to which my invention relates to make and use the same, reference being had to the accompanying drawing, forming part of this specification, in which- Figure l is a longitudinal section; Fig. 2,

longitudinal section ot' stuffing-box and exhaust-pipes. p My invention relates to heating and drying apparatus for treating animal matter for fertilizing purposes; and consistsin a stationary vessel'pro-vided with a tube or tubes passing longitudinally through the same, and through which tube or tubes longitudinally passes a revolving pipe or pipes, around the outer surface of which is secured a screw or worm.

The matter treated in this instance is what is commonly called b v those familiar with the business tank stuff,77 and is that portion of animal matter that remains after the lard or tallow has been extracted. It therefore becomes necessary, in order to convert the article into a merchantable fertilizer, to remove the dampness as well as the odorous smell that emanates from the same.

Yarious methods are in operation atthe present time for accomplishing the results to which my invention relates. Some of them are expensive in their construction, and all consume too much time in accomplishing what is desired, and, in the manipulation of the same, they require too much labor. By my invention the labor is less, and a larger amount of material treated in the same number of hours than by any' other. I have demonstrated the same by actual test, and it has proved satisfactory in every respect. I will now proceed to describe the same.

In the accompanying drawing, A represents the heater, of any suitable shape, through which pass longitudinally the tubes A', the ends being secured in the heads ofthe heater; B, revolving steam-pipes, passing longitudinally through the tubes A', and carrying upon itsv outer surface the screw or worm a, and

journaling in the boxes c', upon the ends of which revolving pipes are also fitted the stuff-- ingboxes b and b. The box b secures the packing at the point where the steam enters the pipe B through the smaller pipe d, and

the box b secures the packing around the pipe d', through which the steam passes out of the Y pipe B. r

Itwill be observed that the pipes-d and d' A remain stationary', and the boxes revolve around the same; consequently the stuffingthe steam passes in at the end of one pipe,

and continues through the series and exhausts from the last one.

I have in the drawing shown the stuffingboxes only upon the top pipe; but when more than one pipe is used it becomes necessary to provide each one with boxes, the same as the pipe illustrated.

B', pipe through which the steam enters the heater; C, exhaust-pipe to heater; G', gearwheels secured to the revolving pipes B, and engaging each other, so that when the power is applied to the same they revolve the pipes in the required direction; D, hopper into which the material is placed that is to pass through the heater and drier.

Having given the different parts oi' my invention, I will now describe its operation. The

heat is supplied by passing steam into the heater A, and through the pipes B, and thel power is applied to the gears C', which causes the same to revolve the pipes. The animal matter that is to be operated upon is placed in the hopper D. The worm a upon the revolving pipe comes in contact with the same, and carries it through the heated tube to the hopper at the opposite end, when it passes through the aperture in the bottom of the same into the hopper below, when the worm upon that pipe again forces it through that tube, and `it passes to the next tube, as before. It can be carried through as many successive tubes as required to accomplish the desired result. It will also be observed that the hoppers at each end of the tub'es are open at the top. The matter is allowed to,` drop from the hopper above to the one below, and in the fall is broken into small particles, which greatly facilitates the evaporation, and as the process arrives at completion the matter is presented in a dry and pulverized condition. f

Having thus desciibed my invention, Wha I claimas new, and desire to secure ters Patent, is-

1. The combination, in a heating and drying apparatus for treating animal matter, of

by Let- `pass a revolving steam pipe or pipes, B,car

rying upon the outer surface a screw or worm,

a, substantially as and for the purpose specitied and described. A,

2. In combination with any suitable steamheatingr vessel, `the tube or tubes A', hoppers D, revolving steam-pipes B, worm a, gears C',

land the stung-boxes` b and b', substantially as and for the purpose specified and described. The above specification signed by me this 8th day ofAugust, 1875. v l

' SAMUEL DAVIS.

Witnesses:

R. D. INGERsoLL, T. A. COLE. 

